Re-add "Close Other Tabs" to tabstrip context menu.

(cherry picked from commit a1dfcb419d160b02dbea79178bc5912686bde885)

Bug: 1020399
TBR: asvitkine
Change-Id: Ib85e84b08d8a39d860b9e87d1eb0f2b1a991fa23
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1894758
Reviewed-by: Peter Kasting <pkasting@chromium.org>
Reviewed-by: Peter Boström <pbos@chromium.org>
Commit-Queue: Peter Kasting <pkasting@chromium.org>
Auto-Submit: Peter Kasting <pkasting@chromium.org>
Cr-Original-Commit-Position: refs/heads/master@{#712018}
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1912620
Cr-Commit-Position: refs/branch-heads/3904@{#873}
Cr-Branched-From: 675968a8c657a3bd9c1c2c20c5d2935577bbc5e6-refs/heads/master@{#693954}
6 files changed